On a YouTube clip that has gone viral, brash Texas handgun instructor Crockett Keller defiantly tells Muslims and non-Christian Arabs he won’t teach them how to handle a firearm.

State officials see the ad as possible discrimination, and may revoke Keller’s instructor license.

“If you are a socialist liberal and/or voted for the current campaigner-in-chief, please do not take this class,” Keller says in the ad’s closing seconds, also taking a swipe at President Barack Obama. “You’ve already proven that you cannot make a knowledgeable and prudent decision as required under the law. Also, if you are a non-Christian Arab or Muslim, I will not teach you this class. Once again, with no shame, I am Crockett Keller.”